A person who studies or specializes in physiology.(noun)
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Use "physiologist" in a sentence
"Prior to the speech, G. Liljestrand, member of the Royal Academy of Sciences, addressed the laureate: A great physiologist from the 19th century once coined the expression, "The method is everything"."
"M. Bernard, who is well known as a physiologist and anatomist, after a careful study of the salivary glands, finds that each of the three, common to nearly all animals, furnishes a different secretion."
"(who help with mental and emotional issues) ... not a "physiologist" as you wrote."